{
  "manageEntity": {
    "action": "Save",
    "entityId": "459816",
    "entityType": "Track",
    "nonce": "0x6116d7e5962a786457d80a43fd9774b3f8d99e5c3eeb52c4cbd68e96de20f0f8",
    "signature": "0x28c075ee2437f84066b1af7c5bd74d4779e7cdb9b1a97f2aaa59ad954ed4354f6acaf0a2f3d60db4233d6293009c85f429d18036f53440c2af8b04b9007732091b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}