{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "957849040",
    "entityType": "User",
    "nonce": "0x1c1339e7ebf1be483bc41a2f99312ac4cebd89af9e96e79ea226de58cc486226",
    "signature": "0xe6e835efd66f2fa63b25aa0e965d8255ac74108d0d103f99759b42b650af75bf23be606a47838d17f91a9e2f96dc76847aa7551295bf28583e24dc11643f78f21b",
    "signer": "0x5Da8B4553216Faedf54f0B756f3d3BA7F6781A2a",
    "userId": "680517375"
  }
}