{
  "manageEntity": {
    "action": "Save",
    "entityId": "1346887828",
    "entityType": "Track",
    "nonce": "0xd8bc9a5796970fa5a8a2df8169aa7b05a1901e56d01cc26790bfd4d545263d33",
    "signature": "0x18b4a1e53d9fd6dcf2e3baa684b11e600c937883134a5a7556c0bbb61bb3c9e87260931e8c9fa5d2957e6e86690e914b0b42a6f8ab11dd287dffdfdce1defa421c",
    "signer": "0x1F9dC682fadBAc94c0Dd4ca2232a3f490704a737",
    "userId": "737872723"
  }
}