{
  "manageEntity": {
    "action": "Save",
    "entityId": "291057717",
    "entityType": "Track",
    "nonce": "0x4018443ed2f2af2d5423510598a1f4ffab38d4f7abcb1e58d1415c671f948a55",
    "signature": "0xd78305b28a71e27e338bd8a46774f169193b86987511e3aef955621c4649204a22c12c3067a8285ac4472a3cccb53ae8a80b3a0ae7bb91d327a940a6d1f72fc11b",
    "signer": "0x3324C23609BC25902C39CFa38CF40581c7Bc7F87",
    "userId": "229134011"
  }
}