{
  "manageEntity": {
    "action": "Save",
    "entityId": "528069088",
    "entityType": "Track",
    "nonce": "0x134f757458424a3982bbf426639020bef13d0c7ebbfac363c5ec11e98976c9e5",
    "signature": "0x1a9414377f2fc59def06f3269de9da0e6556c7f017959341f62f4b19ebe989a35475c9f7552f4767ef0c9c6ff63fcaa89a94312fe296726266566aec3553f0e61b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}