{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "721084704",
    "entityType": "User",
    "nonce": "0xe8ec5f32725e1327d01e4cb4afb6d209b421d8f3b604d5596d241d85cd7e411c",
    "signature": "0x3caecf7225af5d385d787803397f4d960e6f7e3510d57edcb61f6bcc354b0864010d2fc18f1231b304fafd3bf47fe250a7b97e9d64de884fb1f819395edcfb3b1b",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}