{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1687304",
    "entityType": "User",
    "nonce": "0xc5937552344ea523ef6835f45ee86fee1af971db74a04a6f8a5a888b7083c6cb",
    "signature": "0x75b31795384f0f0e567ff3d95e2bef886dcc71b820a0eb7c2b5f3ad9373af5903fa3c30871e88f2ccbf1c925127ac2307eea5c75ae34b4db8e4e968dc78415fc1b",
    "signer": "0xbbB98413eB671bb0000F0b18A2A7Cae9631043E1",
    "userId": "98311147"
  }
}