{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xb72c6f48e60c7c5cf06dc2da8850b45220893605d50acf06140e9062ca3416c5",
    "signature": "0x0b5c0261a115736f833d4a7aec174605e63288aa5146ec2aec1ade914e3e1ea14a6d42d29769b7b7fdc726247aee08ca3f3ab0857a94fb23598f179a637bbb111b",
    "signer": "0x89c72DF8bec7Bf1F1Df74D3FcE9b55BD98be56B7",
    "userId": "973199908"
  }
}