{
  "manageEntity": {
    "action": "Save",
    "entityId": "2020804123",
    "entityType": "Track",
    "nonce": "1792186511077217971",
    "signature": "0x5ba1844468082d025b44033ef4391709e1cea7196207bb8073a649271bd351120faccd3c76be3ab426e19c6811d29d8ee66365b6e428af7b68317ea320b155751b",
    "signer": "0x23dF8876fD80368D375d911e3CbDFd15B8e85CB5",
    "userId": "827420993"
  }
}