{
  "manageEntity": {
    "action": "Save",
    "entityId": "2015828815",
    "entityType": "Track",
    "nonce": "0xb0b5c72a911bd33d411bfc8e87e5e0d5afc204341a55b57d78a2266f160bcd5d",
    "signature": "0x1b3a7d77b6f61d5e1c6f4dde16ad8f838f52d43428c5be0e3c364cf228e131a4117a49a8023a53862199e8605a152a13142e05a81b30dc0328dbe5f8ec94aa0e1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}