{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "301637",
    "entityType": "User",
    "nonce": "0xa5390cac7cc4201ba0dac1c63e8bf3e83cbe3fc38544fc0f61224211c088d086",
    "signature": "0xb060efb03251c7f77aad6996e2033189cb08597d8405b564c8404ffdbcea9caa5e65a1d0821fa400f2bf6461d5bef44ca62e09ba6f58e9e7bbfe80d6666029de1b",
    "signer": "0x3Ab8fF95DbFC0deFd15d4d27949f03d9fDd90404",
    "userId": "136466"
  }
}