{
  "manageEntity": {
    "action": "Save",
    "entityId": "1339610363",
    "entityType": "Track",
    "nonce": "0xdc37ae3f7ce583b18e7c0586fd807773f5d50ec68154bee821640e19c62d0085",
    "signature": "0x4ba3706376b8490e4726308664d80031f12245a71eb7869328188d4b169000a641769a284da5df12b311ddbf88616c85dcab1c8c1db97eba8ca5b51338b5baf71b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}