{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "545360304",
    "entityType": "User",
    "nonce": "0x0cd74003709a70d1f5f9456b72f867caf6f8a274aed646301c9de551aec03a0b",
    "signature": "0x66fca1e67d58f3cd000bca6836cfb7a50b7acb76da961866a799ecbcfcc38e3656f6c6cbd3ba6d83fe1a24daeb2dc23b7dad8d4e7781c6c36cf9e8e82a1ce9751c",
    "signer": "0x858Be7885D181415aF81b736714608bbff4936d2",
    "userId": "357460890"
  }
}