{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "674332703",
    "entityType": "User",
    "nonce": "0x0718adbf12e0ebda7c48637728241ee1463c2f831ee55a00f530e2772ecae3d2",
    "signature": "0x1157c6239bddd1aa9b7b9ac3a0dcbeac962bfbfb3af1a10b0e52bdd2feb481c24eed143ab75550dbdb3caf44bb088d7302a3f5607b9cb5088b9eaa8937eb64661c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}