{
  "manageEntity": {
    "action": "Update",
    "entityId": "591415987",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x4041c93849aa2b8f4022f769fae06ac097ccdb3dc6a12b7a5da84d028af9ce28",
    "signature": "0x6ad9f580eda042e4265f5dded01750a104aca47bc4462b5aaa3e9f31e88d5e621e6c52f0388e44f4ad74cf79beb18c66c96454e5bf3ba2fc6e6d7166424fa4191b",
    "signer": "0xD614E687a3F6beffb5905D0819C003d680A2993D",
    "userId": "591415987"
  }
}