{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x7ffb6b6fadc99cc24925cb48213f361e1a0cd0b3303daad5197703669986bc7d",
    "signature": "0xdd66e98f96a36bdd120f05dd4c4d05c1813db7c264e7410c6247e634ca65201351911c0e3e272fa9fb5466f256f20eed3f464cc3a3136ec4aa5d286c1b837cff1c",
    "signer": "0xd8331bd2c1c12F409a0D8f73FA21a7287E0460d6",
    "userId": "449077915"
  }
}