{
  "manageEntity": {
    "action": "Save",
    "entityId": "480699627",
    "entityType": "Track",
    "nonce": "0x59f61d4eeae3dfda7e0a3dfc7b34d6a35b3a89a1145ce50c9f3607d5d295ce52",
    "signature": "0xcc35b2444c3051e7b2578371cda05a8d9d91a3bde57883b8bc0bd36cb29443a425371392a4030d4fa5fea1f6d0cd16d26d142a01752aac45a35dc3f18cc44cf21b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}