{
  "manageEntity": {
    "action": "Save",
    "entityId": "326802186",
    "entityType": "Track",
    "nonce": "0x18459020ff1a45acfe22998bf58effbed86c9beabca7714d76af2e89f544c7b4",
    "signature": "0xbd801c81af6bc0c579a638e12d0e94b964652d1794399c139eb43f3aa56f8718357a45de28a8dfb05941251f3052eb66f2cb0e175687a7380dd70df30eed140a1c",
    "signer": "0xEeea4f65FD2D7EffBC68176EAbe8544B088Aed57",
    "userId": "584616263"
  }
}