{
  "manageEntity": {
    "action": "Save",
    "entityId": "542166",
    "entityType": "Track",
    "nonce": "0xd9911eeeb34f67d9a5bd5ab6b58a45d78146a1c733d22494d35c96ea0631370d",
    "signature": "0x9dc9c2176268aa56e11d9da866ac9770eabde2ab3089219ced10d7da000eff2312d25ec57adc83c0dec0976a3aeebd6a8ed59ca1d1d84c1231eed195acc13d0a1c",
    "signer": "0x13f8ca0832087662A9bA298e1F708853B8615826",
    "userId": "990836999"
  }
}