{
  "manageEntity": {
    "action": "Save",
    "entityId": "1907035434",
    "entityType": "Track",
    "nonce": "0xe62961ad1fc6e07c8f8c47041efb23ffd924f17c5c1c3dd5c0a7b0a72b364d7d",
    "signature": "0xc3e865df18a0e90a0d65600111d102653f474da85c4dcfa9dd5eadb4acb18f2471d2dc386ef03593dcf7dca911f52a91643685b4691a4812f3d04c9c7d5cae8c1c",
    "signer": "0x94e0dDC50579175818AaCFBC9aba8B065fEf2a55",
    "userId": "460147282"
  }
}