{
  "manageEntity": {
    "action": "Save",
    "entityId": "1981233506",
    "entityType": "Track",
    "nonce": "0x17da73a373d5aaf77afa4e2e04896c8ba73115635a01d0ba4e8b6eef2c81918d",
    "signature": "0xd8d88f4e05969f890f635377ca2d2326d76fc1ab130cde2e1cbfe0ea99f4303266542cd143e161c7d3b567a3317d179dc7cd21fa0d76ccff3eac6f258a3fb0c61c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}