{
  "manageEntity": {
    "action": "Save",
    "entityId": "1357326957",
    "entityType": "Track",
    "nonce": "0xa3e64065c7d99110c984972363a36f077022eca1d079297ac37a88bd997e0c20",
    "signature": "0x79f524f323843109e02d7a15e0f727c9811e2e41d7d17d954cc902fda2c17d0b2e95273e24422ad05096f55962cb5bcae29e13b09d2ff9dac8310c383bbf215c1b",
    "signer": "0xbbB98413eB671bb0000F0b18A2A7Cae9631043E1",
    "userId": "98311147"
  }
}