{
  "manageEntity": {
    "action": "Save",
    "entityId": "1042691295",
    "entityType": "Track",
    "nonce": "0x1b3d300ebc9084eadcc2cd763d5f916c7c1e666a0f4d60428db36c14dfae49aa",
    "signature": "0x3f018e78c172f94645ba7aca3c9016033766cfc4f14d1176c4dece546bcceaed0c1a7e4dbf92d99d82e89a886dd3c0d04bd512b4edfcf303c3e243e39bcfc5cb1b",
    "signer": "0xdB791822A11f5aDc830669bdADa8121a4558D7A3",
    "userId": "347139808"
  }
}