{
  "manageEntity": {
    "action": "Save",
    "entityId": "1684315456",
    "entityType": "Track",
    "nonce": "0x5436d9230a753fc876fd1aee2e29c3f530f52efc3b8561b7b4a29b45e4499652",
    "signature": "0x14423a51222b67e87016ea9afb872820fd8f98502f95e96002da18d14879c1da2c902d3238b4fc4942659eee49e4c5694c21a8ea0c7c76833c33444f3cdf21bd1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}