{
  "manageEntity": {
    "action": "Save",
    "entityId": "1164159967",
    "entityType": "Track",
    "nonce": "0x1cb83f9c6e8ce2cad249cb0a4834b597b4927bb5b19aca17c4b2f2858554fd7b",
    "signature": "0x1323bcce24bdce2bfcdb77fb05b70c1cb750d8aafa40ea1c6dcd8198059d615b076b3f6ca233e21bf908bad365a6e472f02c6decd65f4c886f6f5d24be51cba71b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}