{
  "manageEntity": {
    "action": "Save",
    "entityId": "461257686",
    "entityType": "Track",
    "nonce": "0xcff114acf5bb2437ee157494928b205c1c25651296e3a0228198f7fc6cb8b9f8",
    "signature": "0x9db593b46f579998ffddfc185bc933892f5c4cb99ab912575c660929d84543f03af1c07c48c68fed83a9f4a2c08f34c18679bb6424a40ec6ae80023481495c351c",
    "signer": "0xdB791822A11f5aDc830669bdADa8121a4558D7A3",
    "userId": "347139808"
  }
}