{
  "manageEntity": {
    "action": "Save",
    "entityId": "1907448598",
    "entityType": "Track",
    "nonce": "0xa2d784713a6aa99d4a59d5c7c46aa36fe977813797dcab85acbfd93cc78f94fc",
    "signature": "0x44a834603e1330530155a15c155011c2c9801c0d636b0e7195df562af287a6ac1f9fb0ac7f479e8dae15f6c25b1ca3f45793d594fe3df3cde11c64d724bdc52d1c",
    "signer": "0x5d9769ee980da859C3Feea4E742ef39dcF369E6c",
    "userId": "44983627"
  }
}