{
  "manageEntity": {
    "action": "Save",
    "entityId": "80002",
    "entityType": "Track",
    "nonce": "0xb8cb48a950391c11d1b08559b7b7cf3035f6372d114e8e7b79c3ba420a1df8db",
    "signature": "0x34172730e36450042a6696374cd95dcb7361019a9e59e76f793156a62208ee915698b90da3d0df8bf0bcfba97798caf82d7af8de9a16ca6e489f73be3e6a0dd61c",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}