{
  "manageEntity": {
    "action": "Save",
    "entityId": "2122929294",
    "entityType": "Track",
    "nonce": "0xc6c0a4d9763baeaa2055f6bc382c41f1bc3d0289476c29e5c476837a95d42678",
    "signature": "0x3e141b8d04b8972cab454afc4a86201a5ff1d6de36877497a6828a08b9a1d86853b23fa9ec2272a1b595d9a5bb0b16cf9688b7193fd6bf430c481948d4871f6e1c",
    "signer": "0xF50C225e7d3C705f83cFE11452b4359B64F13Ce3",
    "userId": "962001878"
  }
}