{
  "manageEntity": {
    "action": "Save",
    "entityId": "1086915",
    "entityType": "Track",
    "nonce": "0x803b4294225acfb00c6c33a76dfdcbff36d0e5565af6fb54deed79258d836b50",
    "signature": "0xcb7eeb95f652dd28539556f803e8baaf6bf6703e98819953ecaceeae10833ba14fa04092b8cf69cae2e9a7f1263d7c4a54fa9e0a03f9a4cc093f088c296a4f571b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}