{
  "manageEntity": {
    "action": "Save",
    "entityId": "480517024",
    "entityType": "Track",
    "nonce": "0x13cf7c2583f226182e3f8ed11c4cb501e4867c56120a525946812a233e48c23b",
    "signature": "0x7db4772c63262869bd040079c3c117e46b956db97f11b222327e65e205352f6f27fa84e007073d063c7730af8122ec1dcd8fc4110c87963a342115d92b57a25d1b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}