{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "543971925",
    "entityType": "User",
    "nonce": "0x2152d41a108a397dd5e785b8c17fb7f9ebea858db8c1846c7308037b9c5169a8",
    "signature": "0xce8f8263ca22f8aab912c7c51cb5039ea8b352373591221b1b2bd48ce8f2f5834c9aa33c2f02e2354d92617c06bc3be7957934e11dfb4be54fa62134b55218d81c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}