{
  "manageEntity": {
    "action": "Save",
    "entityId": "1816101816",
    "entityType": "Track",
    "nonce": "0x727b29dbac5bf36d01e9849c156a981eb9a13e69c43eb9d4034351ab40d81aff",
    "signature": "0x1927714d131a60ad8e0a007c1240b43cd3ddbe1c04a2810593d224c68e6505125d1afa2b8ed50f096bb1c382e8acc78e0d452d4dc72a572886a476549cb8e1fc1b",
    "signer": "0x9FA029c6E43fD9781215e024e9ae5802602Ed2Db",
    "userId": "738673571"
  }
}