{
  "manageEntity": {
    "action": "Save",
    "entityId": "1631541357",
    "entityType": "Track",
    "nonce": "0x4b31077be0c24e218b507734c301711867e12fdf04a4f27218462635361dc883",
    "signature": "0xe5dea02234294ed7642b5dca5141786124e42d852c606177604bdb4f28db432f0f363fb2d30ec4d449352641355baf3796671cebe81b892589c67335252fef5b1b",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}