{
  "manageEntity": {
    "action": "Save",
    "entityId": "2109577130",
    "entityType": "Track",
    "nonce": "0x9900ca8e209f643f4f976c885ef8a466ed8254d09dc6a85f00b646b5a89db30e",
    "signature": "0xb99c19147e4a068eff29ff10792e661bc27dc29d1ab366b2698f7b8824c5d051168eeba5b2b1dc830d16b0c7645176fbe505087d20bec216a23bd06c9507e5d71b",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}