{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "391926323",
    "entityType": "User",
    "nonce": "0x8ff50fbfbdea3a0d73a90dd99614c6a0b4d0218450b0bb88451d701aafb0ed03",
    "signature": "0xfb3a37d0f8602ea86c4b3f0ccd59a65b2efa76ad0d23daa2b070b089de0d893b66e44e39a1731a62c03c973d731accd3d9c9670109cc44e4056b1ce284d436821c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}