{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x1b879ce094914d3b89e638296254467d6f83f75d8a466d751de62d02ae8a2b19",
    "signature": "0xa9b72600b0ba0f7ac0a234d22e8672105a18bf4c86fc1d93af64b8110d7376935760f1fa4d5420bf264fa985475474ea94bef0c27cc286154643238427dd38d21c",
    "signer": "0xCA12d94C7bb55aD7336C5790f225776aeb63e855",
    "userId": "399217822"
  }
}