{
  "manageEntity": {
    "action": "Update",
    "entityId": "976905984",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera2pyisxkunfs3w24zazw32abiztz52oczb4rfi5i3livfty4f75kq\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":1556078982}]}}}",
    "nonce": "0xb569c31d540438cb590e88f496b0cc0c1672be717c488ec45f8ad9167e9c8c59",
    "signature": "0xb18f0bbdf17ba90583a3588d664549e874e067fedb2003337a3a92f6e8e68b650df4394ae7aac5dfe06af5dcc23cd71d050ab4d1bf60945acc150565b93f69751c",
    "signer": "0xD9fD37C8b3537B62C04808cF6fA6A809dc8E8525",
    "userId": "976905984"
  }
}