{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x7d7765c932b6339f7075859c78c8f687fdd7db6926f020c8ad2f67ba5d8a777d",
    "signature": "0xddf13d2be35f40323bf6bfb900451cec4d4ed31003dce5f8e8d2b739eb9de3c02969982c29a7c2ddba5bd84a1726980db1907233668775dfacc8d8c1aa52463e1c",
    "signer": "0x376F8aABFbEA5892b16eeFf35C8504520846f157",
    "userId": "45556078"
  }
}