{
  "manageEntity": {
    "action": "Save",
    "entityId": "1570613306",
    "entityType": "Track",
    "nonce": "0x3505725f3985ad5af3a6f7976065d55ee957768acd6ef0117c3edf7cde2b3620",
    "signature": "0x45b9c69c0c0607f61874109890210d692c343f0e82b434ecd7c267d7ac6ee195711d2dc21d9b67a252cb44b3252f80d499560345adbdabaf7b50e805d70f1d6a1b",
    "signer": "0x56e1A1DA7e462EAb52B3A45f6605f1bbfe0D1858",
    "userId": "301637"
  }
}