{
  "manageEntity": {
    "action": "Save",
    "entityId": "1360939914",
    "entityType": "Track",
    "nonce": "0x5d58848e144bfd7927cf30902e6f71c4d21b576ac3b294e72a65965e6fe34d35",
    "signature": "0xb8ad2f03d9c8f49ba5d10f496e14da9cd02efd76d4bdcbf85ff8b52c288492e82b64cda110cb470553efd45401b9cbf4b555ecb1386f744e9b63b1c94e86fa9c1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}