{
  "manageEntity": {
    "action": "Save",
    "entityId": "1685880321",
    "entityType": "Track",
    "nonce": "0x000d387154a1559951fde113b06ff7a1e66e2e2dca39a31431871d99564bb21b",
    "signature": "0x684518a8662da8282b11d8ce4f5f59c998ba70b6de819189ab541ff3081a220253c6d213c381a3ad460613a4c6770ce9a300cc34cbcdc83d8dda0ecafec88b661c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}