{
  "manageEntity": {
    "action": "Save",
    "entityId": "884026940",
    "entityType": "Track",
    "nonce": "0x47106225da56c44cca1ac465f87ca62975d8949d0ad7c124a8a248db1f57eb7b",
    "signature": "0xad1efe1e5011b284f7e2fedb295a5782f40e7b10045ea592c783a863b6c61a6d4818d197ea47a35e014f9fb0e934eb5140444beea2027a981fe31cfbca8338dd1c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}