{
  "manageEntity": {
    "action": "Save",
    "entityId": "40876",
    "entityType": "Track",
    "nonce": "0x548d9d50694b100262a161d0c6d3d8225cd9b1117de124da21c381da9e9dff6d",
    "signature": "0x59f661821013e3caf9fac1fa0b430a4c72faf1624e5fa78e39ff92e5ab964df377d557f1e70bbce165afb487a37b6140c7de8195dcd42fd4754af0b34bf43f5c1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}