{
  "manageEntity": {
    "action": "Save",
    "entityId": "1457966497",
    "entityType": "Track",
    "nonce": "0x17e611dfeb4fb3ee58599cf41df118f9bcdf0ce8a558bc109bf2d083e41ae701",
    "signature": "0x2e28fe85a9d55537c5fdc2f905d2bbaffddab5293ae23ddac2ec937775e4cf8551a22966b0643bfcbf6a128be22d90b8b83aeafb5910e0ed54ebb1d5fd0b6b261b",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}