{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "660696906",
    "entityType": "User",
    "nonce": "0xfdaab54a7797bfeeade99efabfbd948f570280a854bd56f0aa4946505c12a3c0",
    "signature": "0x257e56419f6443c06d0b1a55ea929b81d8b9547dfbbb5a002fa645290303745c7d486cf6abeb0c753f030492dbf0d454e20ac1ef2b2e5d0e9b6251f3422775021b",
    "signer": "0x12EaF77464824447aA995e75Dd707B3e5246be9C",
    "userId": "409175645"
  }
}