{
  "manageEntity": {
    "action": "Save",
    "entityId": "459537062",
    "entityType": "Track",
    "nonce": "0x79aed0f480e398303f14cc57247af310df48bf1954b269f9ba5a38ce8e5f7656",
    "signature": "0x873a009bb8305595daa90947e7e001548666b08021f39f05614b020289affd9d1c9a148f3ba5b4044167c0a551674fd9d139de2fbb659d593cbe2e38eeea00db1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}