{
  "manageEntity": {
    "action": "Save",
    "entityId": "737673372",
    "entityType": "Track",
    "nonce": "0xbf444babf2a84c14352ee68e9cdb035b26941700a59878b53ce74f0010448822",
    "signature": "0x39f68fea5e89f2e7575231b4ce59fa0b6fd4646245e0f781c716b7d4af3e7b0f67f18fa8c39f044d5ce529a52f664ffa141e0173f1d4c6eb6f5331463b48a3501b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}