{
  "manageEntity": {
    "action": "Save",
    "entityId": "996287752",
    "entityType": "Track",
    "nonce": "0x71c736e6f00553a1418b8aca60159b88ef6c1b8847579b63a64d0246c5759e7f",
    "signature": "0x13ca2062fd459430e23e33007eb0329034fba2d29fbeb5f265cb4eee67781f464e79880b3de7af83dc605be968c795fd097840b531d07e172be445e507ed83a61c",
    "signer": "0xDfAC0702040EaBd2d42e773014D4b014C0747D9c",
    "userId": "707937"
  }
}