{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "737872723",
    "entityType": "User",
    "nonce": "0x5edc20861b919aa22024ac03b2584930ea42fff38777fee1f0ce15d1de2ecd69",
    "signature": "0x501a1a2d9b2b245c32f6013362fa41544ea514f58c9643410b76cebc61cfe3160ab65b6e52670ddfca22b99581159e01fbc7081cbca1c162d8f6410cbdfdc8981b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}