{
  "manageEntity": {
    "action": "Save",
    "entityId": "1785992408",
    "entityType": "Track",
    "nonce": "0x53843b20791a95a0c4d402e77b4861de064475e76aad048a033b2180cff1b93d",
    "signature": "0x5ac2d03be3e341b1759ebaf91f41016f8adcc0b872a0c29c415f74f102f814d56cc466c4ecc9a2c37547c899559a56744ca1cf7e749f28890264359307dd17d81c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}