{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "668973619",
    "entityType": "User",
    "nonce": "0xb00466f7f448b54faf746111f38c930eb380b3a5ab4fe77fdb4796d544d81bb6",
    "signature": "0xe5a877358604474f911be914f988332e6455e28699e28b422e1fde3bc0826d2e7a39d2959dc138410146f076536a679fc860645f5eba0b08cee637a2fae760141c",
    "signer": "0x474B8467757bEdBa76afC2394cfCb801C991B143",
    "userId": "815537464"
  }
}