{
  "manageEntity": {
    "action": "Save",
    "entityId": "26477304",
    "entityType": "Track",
    "nonce": "0x3f4bbe95f93aabcdca59a3dd807fa8f4c947502396f58c01396ab88fde892689",
    "signature": "0x664cdaa3bae19340cc42e92b56b48f2df42f00ec6f03199db173a2ef6f380561289edddf03ae69d2dc81d398cc99b0cef48ce672e02d08371b743fd6b15191751b",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}