{
  "manageEntity": {
    "action": "Save",
    "entityId": "214319100",
    "entityType": "Track",
    "nonce": "0x1774ea45afe32a95733cdce1d158fecce7877b4c34dba9c858d4f7ae2279af08",
    "signature": "0xaa9f7ff6fd9981c14fc2ef2801694dcd35b327e5a9116a29beb7e47b7e2c79914418e924aee590ad753d2233183fcb26477f61e5babb12d04aa1c96912398f081c",
    "signer": "0xbe465AA25655a6E6b63480fC80284D554EcB33eA",
    "userId": "334539"
  }
}