{
  "manageEntity": {
    "action": "Save",
    "entityId": "870550966",
    "entityType": "Track",
    "nonce": "0x8deb6a4bc9a38212ed3ec690ad4eed0e57c8a1b478248d15a36636ceed0f942c",
    "signature": "0x8dc231aa34be5e8fa83b427859ad42b41bc1e841dec76dd7139b685376a8118c74f2eae279d9b7668d3588101f5b420e726a47e652a1736e96d8248b1ff7168f1c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}