{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "380504",
    "entityType": "User",
    "nonce": "0xb599ca81e8319355509b7e85c6e7780f3f23743726ec60deca1ecb416310c87a",
    "signature": "0x44f8505f84a12f4e08eaa01571d3e7052f0e3ba4a6570fefa541f34b31590f3d0f5ed6d494e6b94d86327235235bde76aa6e0abcc800c3c674840232d1bf830e1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}