{
  "manageEntity": {
    "action": "Save",
    "entityId": "480729853",
    "entityType": "Track",
    "nonce": "0x7c3f3f4900c87dead41730c5b175e91d16217bd5dddafed27fca016c1e411b77",
    "signature": "0x283f8439e62d039003920f6b4cae5c53006500ef07450a0a9f9a309a2ddf88f4536e5912225d40a478c62656d3f060c98c5c3ff36b428d1540929ce39534e0b91b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}