{
  "manageEntity": {
    "action": "Save",
    "entityId": "1938669936",
    "entityType": "Track",
    "nonce": "0x5ea2e4fa1db1e3b5e2872d242c1a83bb55f7fb6503b6aabd55d76c8ef642f503",
    "signature": "0xc3cd84c88e1b9ce7de53aa51c22d49310c52c2669211bc7822db379bb903faf81227c94ad24784292cc523f6564364ff356cfceb930982f5b575be7081f950381b",
    "signer": "0xcdc1772589e70ee6667FAaC93E3F0CcD5BFDa2aE",
    "userId": "354908"
  }
}