{
  "manageEntity": {
    "action": "Save",
    "entityId": "20452984",
    "entityType": "Track",
    "nonce": "0xaaeddf8cb30836594fb5ad8ebc848511f1bdc785000a3d2e409482e970ee85b0",
    "signature": "0x38589ae7bf93777cb3b6ca891d45b72b59077741bafe948f943800525e7882216b95c7517c28ad6f62dcff3ee810230040d148689d34e9d68c428870bb508c131b",
    "signer": "0xc03cf24b1C519dA6a18B6509c7F5C57d01620755",
    "userId": "870665506"
  }
}