{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "257674",
    "entityType": "User",
    "nonce": "0x51a676e7e6747713b4d14ec754378470fc3188c94f625eee29b37cbd4e28b1aa",
    "signature": "0xefcb6dea13606a6d6d2448bc19bbf187af20d02c6b400bd24dbef1212519cbb47ffbbecfa04c603192345c8a9582d69db5c2744966e0a67b6538ef2760554c161b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}