{
  "manageEntity": {
    "action": "Save",
    "entityId": "286887",
    "entityType": "Track",
    "nonce": "0xd15d99bb0fa4c65f39e8a50cb16c70533c9d5106c1e63086744a3977d9099e2c",
    "signature": "0x0f9af21a487ff6e0abcb849065a5c8c0fba133a19a5883bcd2e5d3268d67d50e7e4a54460953e954606ca722a64abbe7261bb324b589071fdc0044e2d0beed5b1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}