{
  "manageEntity": {
    "action": "Save",
    "entityId": "1685740650",
    "entityType": "Track",
    "nonce": "0x30487f605b266a9fc74717dbb350e535f0b3891c3c48251d16b4385089347d7a",
    "signature": "0xa8404de6df29ce69d4bde42ac570b5eb2e27b6dba136f8fe6169daf3c318321542f327ca9781664a4e522c430268f8a718f15b782ef6f3c01476d328ce911a211b",
    "signer": "0xC35123bF05ca0B3A7B333c53E47bcd9f9DA864d4",
    "userId": "33896318"
  }
}