{
  "manageEntity": {
    "action": "Save",
    "entityId": "1173996151",
    "entityType": "Track",
    "nonce": "0x788288344154ee7201ad3cb6cc3e249253a4d20caa48a85988e794b655d9a9d1",
    "signature": "0x9c6641db4b4b1d2a91726fa0456f160e43cc70a9152ef0ebcca6deafb89119284e43667e226f8f8dd98cd6624611aa31c775c5261ac48a05ee7d0df95a64e7b61b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}