{
  "manageEntity": {
    "action": "Save",
    "entityId": "2071486338",
    "entityType": "Track",
    "nonce": "0x7f4f52a2f043c73204aee8eac4638a5c8463011122e352727e387143d179c8e8",
    "signature": "0xb715de4a9d153de445f6294269744ad928c340d2ebff396bd56bda3f0cfc6b9b0c0885c0b1476e1d6d44c749bcb27339c3b6956eec7eca8cf245f6310d62683e1c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}