{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x1a58aa8a73a924bf788298251d2ed1e53958b84f63567d5e95fc46b19235748a",
    "signature": "0x6773aeef5eb96bd5b2b91be67119e07b6e6dcc40ae47a8f1a1f1e6538676fdc93279c41651bac41a8187ccdf6ec7d9b47474a65f4e262032084d96969e0c90121b",
    "signer": "0x3df1D80c0836a5b2ae8fBb009AE9DE9A0C9f4fe2",
    "userId": "748290845"
  }
}