{
  "manageEntity": {
    "action": "Save",
    "entityId": "1192577776",
    "entityType": "Track",
    "nonce": "0x5fb07ce97be1684db7e3f531c0426c113b0d55edf77ff3c555b0ef7b6e1198d3",
    "signature": "0x54234a7fdb8b480f124a84a990b71f4a2c0bd359056cef3f10dcc0eedc9776dd0cb3b626e6d5762d0b17c741a53057d161ba5852bb8c536993abcb3d0503fcbe1c",
    "signer": "0xD586F3Fa8b52760A9b982EE658a51dc293559a62",
    "userId": "867360766"
  }
}