{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "15430",
    "entityType": "User",
    "nonce": "0x3c721bc8ddb9547e4fdeac948ca13b641e9eafeff17840819bffc670a0940e27",
    "signature": "0xeb6430b7a1fb7cc05f01e68bf524016ffbf9711ad5509aa1eb8a7b781cb23d5c52c3092e46e824b51043456eef3b463b7aa1335facb34f8e350ee849223855251b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}