{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "400171089",
    "entityType": "User",
    "nonce": "0xa1a9bbc684334f94de77e6ba98b5c8a11046bcd0e20c8c5fbe6cceebfb69d5c3",
    "signature": "0xea2071a9c05ecc60ee199a29e0a76cebc2856ce5a4e8a13ac2d45b05ca04295a37485a006b1d2a713ac20e756d01f5d863cfb419df27789ab109a8f4de411a8f1c",
    "signer": "0x399726fd5A103a5f9026e1Cfe43Fb38073AE3A3d",
    "userId": "193799807"
  }
}