{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1474384",
    "entityType": "User",
    "nonce": "0xd55ef5dd2a87b09f13f8b9a778779d73727edc8fb87a307e3fb1a52377770a29",
    "signature": "0xb2393bb7a99eebc13c0605c94fffcad4a478e1c52a1a9f942a4c73e215c4feeb22d3d0e8f6a85e3c72b995c49917efb933c00c5ef92daa3515f60aef11d1093f1c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}