{
  "manageEntity": {
    "action": "Save",
    "entityId": "1293531126",
    "entityType": "Track",
    "nonce": "0x503835140461a3f56ee4c23abf04b3e254885ad40570956eb41c4272575d521e",
    "signature": "0x5453fd0c264ef881aa2e889a4289f2efbf0d4d8f5a754be0b1c7c95bf187ceb0653c3097e30cd476e5dd2fac218e94345ecee9d8a6a670331e48060ec91d04461b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}