{
  "manageEntity": {
    "action": "Save",
    "entityId": "1547293102",
    "entityType": "Track",
    "nonce": "0x1f33c72a3419ea1b64432627c7d7334be8d70a5e0f70cd0adec3209abf739397",
    "signature": "0x486e1b5818ecabefc6290d0ab2f03c382b8037a9e09de479a96cf3cf4dd2222b6e12fb99109bd51acafc00fc8a2c0ac4f00c4aaa126fd30e04a68e5395bb82251b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}