{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "75700",
    "entityType": "User",
    "nonce": "0xf2b699a99afb9fa8eb6a1c9b3390838d223257fbc556f2a9d8185fa68f22a88c",
    "signature": "0xf2dc44ec0f23e04dfc62ba006257cf64947bd318ca06da461940b5248c1d27c52aca2f1c0b6d190a3893acf2b1c032bf98a3e0a0e29ab595d86ede8d25b3b6c21c",
    "signer": "0x408CbFDbc09C9aFB99Da5f010D04f50A190b83B6",
    "userId": "675830993"
  }
}