{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1439725",
    "entityType": "User",
    "nonce": "0xa1f0b87fbc2a6fb684c2b490aed5b959b30692a049904bf58c7116584d5e0ad0",
    "signature": "0xd530132866e39cd429371f62c2a91bfd168f2de87127cc35e71911079dc57ef360ed3abded2307177aad72521f3032015f86d8aec3d207c2a0c123ebdb6d51911b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}