{
  "manageEntity": {
    "action": "Save",
    "entityId": "592201",
    "entityType": "Track",
    "nonce": "0xdf8208db1a51357315167fbb2080be9f3f78ccb90c3dfb448ab007c8ad6a09c2",
    "signature": "0x12cb5a1d632bee86ddeb4dbc5154af5c7b04bc57ea2503456b7dae1454904733143c7f5d80ad59b3159e12988c083f196a519542656c72de77c7ef166581a0401c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}