{
  "manageEntity": {
    "action": "Save",
    "entityId": "943738301",
    "entityType": "Track",
    "nonce": "0x4b90fd99675bbd9264862e1610bc04aed2fde23bfb23f965b4f2e11fba69cc49",
    "signature": "0x71c7beab06fdf2466c081c76a23bd76c4fe596670d7e12c099ac614aaa3d51e647566af41ed79adeb67bf77356c47c1632521d1d0de8630e9e888529a5b46f921c",
    "signer": "0x4230116F60d3989D218B84425D3D1Dd6C85e1393",
    "userId": "86128800"
  }
}