{
  "manageEntity": {
    "action": "Save",
    "entityId": "522924165",
    "entityType": "Track",
    "nonce": "0x98d6905862279b48b759a9506f02081f0d0db523aa6f24d528ab7ada36cf3d51",
    "signature": "0xdfd8973e25a0a356de2fa9d3095949244a0a6918af8be8f9005608e1b884464123b48433abbc976d3e80acc3adadaa89fe4ae1835ad7312dfe725c9f5aa7db791b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}