{
  "manageEntity": {
    "action": "Save",
    "entityId": "1945469536",
    "entityType": "Track",
    "nonce": "0xc43d84969992f6a5389c614406dd71c98196bb189851c977840ab78bde847554",
    "signature": "0x7effc75cd20717f5465928d6a0f8ddf7b7c59d37306175ac21c82a9c295dd79e6834ddfb578de2a6d3add4b7df44b32e19a3981014e064e7484af26b21992b5b1c",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}