{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "753078",
    "entityType": "User",
    "nonce": "0x3c892ef90071478211fc96d38bd9ff3513b0f429e3a73115f3efb43d268ca91c",
    "signature": "0x3579b1f8f0b164e68fbd3d2eb1cb3cae2c54e586360a844a72ce66b0cc6ccb4951abe870fe9f5f2cd140a5956f5e08612e8b342afcd88f82aba33b7b240a0c9e1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}