{
  "manageEntity": {
    "action": "Save",
    "entityId": "135764",
    "entityType": "Track",
    "nonce": "0x562978d9652a68ab92086243b8829890161fb662456eacf029d7b45dafd92005",
    "signature": "0x63558deccee5d376f6862a4711c629ee5862353b81e20807ae4034acb977a4b702ec1194b6873d34e535012dcdb61087433b77e19b73da2a696762bb15d395df1b",
    "signer": "0xf63b89A0Bbc03C7ec59aC257C7082A056082cDB8",
    "userId": "558452493"
  }
}