{
  "manageEntity": {
    "action": "Download",
    "entityId": "701664069",
    "entityType": "Track",
    "metadata": "{\"cid\":\"\",\"data\":{\"city\":\"Tokyo\",\"region\":\"Tokyo\",\"country\":\"Japan\"}}",
    "nonce": "0x7dc2d6cc3c1d86a87943bb47cd59dcbfdac595a7dc9e959325719487030d4e54",
    "signature": "0x544328cd089a237f0161b0e45fa8e5c6aa6a84b7acb930c3efcf9786c5f198f326d295137ed94dcc44504a509f853b0fd7523f5316511a6c0a79e2942e914b1a1b",
    "signer": "0x68026e22D7BEBd5f457Ff56664a343754CD05B58",
    "userId": "60341407"
  }
}