{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "591496693",
    "entityType": "User",
    "nonce": "0x2e8cb2b3c296104e451e5be27df3a81a94a866af205173a401f5fd3a0d344f85",
    "signature": "0x0bac3aacbe3f9f191782cd72e1ecbcd7211797c03ac304ff6b0ca13185dc86516e47b146ca0c790f2e0754b45d5db1315158834e3b7d0b21b1a75c2d32c18dcc1b",
    "signer": "0x8c6a872ee309520C05937fbd7641989Ae6FF06D9",
    "userId": "789456887"
  }
}