{
  "manageEntity": {
    "action": "Save",
    "entityId": "1932964718",
    "entityType": "Track",
    "nonce": "0x8778de1a2ffdbb940d9975412309fd9d4885e7ab824c7d55496e2d03ac4e0c39",
    "signature": "0x4355d120353076f0cb1afb29d10f5d7c073146a1a9e075e44722a5f977549dc97451830935a2dab95cafbed066b02e5b5faadf2f53db2cd7199b7d035184b1a71b",
    "signer": "0x204E506f1D5498d2CABD41d2fc7a3078d5792835",
    "userId": "768479471"
  }
}