{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "345493",
    "entityType": "User",
    "nonce": "0x3d6dc09c8287a898a96b16ad8bab1b0684ff1414c1f1b3c90e1fe9c8a184b2a2",
    "signature": "0xc0c6a633592eb1b6b54164bb123a4cff073106721eb1123160ce25cb3b1f7a6c0b69c458057d5824955e38d79a26b66a7792ab4efebd66493c5013cc07d97dde1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}