{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xb458206a3154ba6ccbd85e59613c3d9e6d595809b4c143263d60d758b104aa6e",
    "signature": "0xdf3bcc6cdae16d698021bc764fde0ed24fef7ab18749ffd778479246bac9d29d064535f999f263f97f3b76a4152995e51aad87cd095f4600c3904504484074921b",
    "signer": "0x729468e227680FD7b9523298fD676404143587A6",
    "userId": "270957414"
  }
}