{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x10af942fa373fbfd1e23da123ba9e1ed94b91f3846c0dbfb759d73b2ed51f518",
    "signature": "0xecc6e3ca71b8cb7aa765410c8371609231f23e059d63216484a9c45163d4a40a3f36a8e6a2a910e12a8b496106c3f0ecf751844a9ac6a5583e54dae3f56780c71c",
    "signer": "0x877D195E0F5Df3506016fBb0fb1b1E26e65B203D",
    "userId": "508153670"
  }
}