{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "12",
    "entityType": "User",
    "nonce": "0xd46d37f70fff427d40cd0077eccad24f07a9ee1104e166ff2ed99ece09b4e013",
    "signature": "0x59820a9891361d07703dc633448036ecba884992fba011dad2c42bf657eff6fa57930c66c5770bf77952676cf3a99077bda6c6591e373b979237818c19e131fa1b",
    "signer": "0xE7A4a8f1d081B44C96Ed68610B6c3016ce8cD6E0",
    "userId": "464427506"
  }
}