{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x73ff4417c2b2a4ae8e00d247313aa8f2bc651538a1b1154ff2eca1c4c4eb3960",
    "signature": "0xcd9e798a2b6dd77df57cc53e2eee9598dc07f6416570769ca89f2c6e1fa5bfc839ff301e8ccd5161209b26e270ce0bd8a111a6ac1b2c68752542ab965297f15c1b",
    "signer": "0x50CD2a9A1e58cE6e8fBCa14A1b0267A423813E18",
    "userId": "814123074"
  }
}