{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "678556080",
    "entityType": "User",
    "nonce": "0x815e0647de2f7aed7ae53f30930b51103f48eab4f45ad3cfeb6879465465dfed",
    "signature": "0xf5b99fd6e4152a0595b7c99dd56c06e2f6a85836e351d586758d1fe2ce63111303b4531e43624ba375b3475434a7a3b69240742f4f19fc7926334fd68273097c1b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}