{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "100011",
    "entityType": "User",
    "nonce": "0xf65c450ad35cfbbcfde9c78be08a6da616254be582bb87a44a9845a83a88caa4",
    "signature": "0x207a330cf96f065c9b54506ae96e700cb01d12636141abc96c4dae73e1ea3ed87d7f7b851abc23633a49a977bcda6498cd57323102b2bb46b5438337d7a65d3d1b",
    "signer": "0xa899e54a1aE2f8D645E14e3E1EBF6398971ece5A",
    "userId": "906687997"
  }
}