{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x9b809a0b94b2ff82ebf99cd98d19ae692fc5adf8b0377c1993a63aca4ec21c3c",
    "signature": "0x958d2df6184730770ff77226e61b5ab4a3fca3d3caa29251f00f6ce1bb8ac5b1002e9d97166ff0d7fea759d8b3cf1f861dd7e7eb28f7fdc1c48fc5261d5af09d1c",
    "signer": "0xBdD12e814bBE1d3CDa68D453F36A5d18A51550f2",
    "userId": "144124489"
  }
}