{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "16007",
    "entityType": "User",
    "nonce": "0xca3f6aaac20bf1f6a4d9c98fd4c2d81d5a371695e580b54c8d0efa8e6b02927a",
    "signature": "0xc9cde208ea1e62ef27edd7ecef5e047410e9a1ab2c55409716b49df680607f553dd6c4659f9adcce97529253f365da8fddd36b90e2d1f94ec8d26366c0295b991b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}