{
  "manageEntity": {
    "action": "Save",
    "entityId": "653505537",
    "entityType": "Track",
    "nonce": "0x1170027869063f288e2ad0a51363d192e7715fc65061309b9fe84392d2f4b17c",
    "signature": "0xe0e98d160a893424515f29e699c693c1b2adb9f04500d9b82e77969c2dff16156193bbc96fe336abe4e240901ae79162f482731d64978d08f48c45b52ebffc5f1c",
    "signer": "0xd85E4A094e4C057572A9D525C9737051A17ab609",
    "userId": "696716320"
  }
}