{
  "manageEntity": {
    "action": "Save",
    "entityId": "662013",
    "entityType": "Track",
    "nonce": "0x006511da7543136e76bcbbd3b9dda7f8974f2ca76041440cdbc97070619556f8",
    "signature": "0x80268a1e98899d98af98bebcf47d55a0bb42232cef7271d8832f0cff02583c5f79a62adfde17f7eaa022b6ba5f042fbf59dff22036a834f591a34dcfb0bb8a4a1c",
    "signer": "0x5A6DCd6E22135e4225594900c17114A7dAD01964",
    "userId": "580576096"
  }
}