{
  "manageEntity": {
    "action": "Save",
    "entityId": "281078283",
    "entityType": "Track",
    "nonce": "0x87c3a1ddb8aa473c550ac61d24685d18f8929c0b5718ba9ebe12dea68c43fb42",
    "signature": "0x31236f8b18e34e1da1b8ede644efaa96565b737cdf6f6b1a04c8f38a3ca32f3057d249c6ad562831c18659ff84820d3891507f4ccc9b78a2bb482259c5df0f471c",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}