{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0xca27cc5493a5b98818155e32974d4f602e81c278bdbdea9272d32221f6a9e0c2",
    "signature": "0xa25f731d79c9e8f522b15d048ca2ae7c0d73ec25b45cfc83b25c5718573a699d6f2f8c097455404fc03ed398820ec8867e7a24078d812a9b64e989f825cc21bc1c",
    "signer": "0x4771D256e7217EB6B247e8cBaFbbCb199424a6b2",
    "userId": "836389559"
  }
}