{
  "manageEntity": {
    "action": "Save",
    "entityId": "29751380",
    "entityType": "Track",
    "nonce": "0x2ec2683ccc065d210769696e03ccb5bb783495470941dab1ece6fbf370ea5e54",
    "signature": "0x179913e91435b8e534a91e3681f9064847b060439fcf932626a5fcb32cc42cad7c60eee5def5a907dc6c25c6be63b6c590512ba1e89ba80e932b133859df2c881c",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}