{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "764",
    "entityType": "User",
    "nonce": "0x5f1f5b6cb2e29e0d5aa4ada9b17a08027684ee0d4e60f6f51a09d38abea1463c",
    "signature": "0x4a3f6dbd7bc3b383495486edfae53b2df17b0b2f4bfe7afc094704a0b41be0e173bc0cd5b493c6447bbff8385567695d617bb2e964608fc871e731b9fea96d1f1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}