{
  "manageEntity": {
    "action": "Save",
    "entityId": "1953046267",
    "entityType": "Track",
    "nonce": "0xb36b2918a8b37cd3c55ddbc9087eb0ee5305f20f656eadcfc9d9568fa4fd08cb",
    "signature": "0x7f5ce161dc5f2a0ebe07228ec57731b86b363aabf0c46b99d7dea78671fe79a958155e24f6691b9ace1bf46dd427e3cbe41b1b7bc5fe5e96034a7a45e00b52021c",
    "signer": "0xDfAC0702040EaBd2d42e773014D4b014C0747D9c",
    "userId": "707937"
  }
}