{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "537",
    "entityType": "User",
    "nonce": "0x302f374dfee4a0563859fe506c46453497265a5c49a2786ef3bb83dd7a49a7c0",
    "signature": "0x8b0e36449442a2c307d46820fd9d5413bd1c9dc903668e14b5b680889490b89a0438ca9c5bab0b86a7e4ad232de5c15e12ba4d097ccec095677df851239b38e51c",
    "signer": "0xE7A4a8f1d081B44C96Ed68610B6c3016ce8cD6E0",
    "userId": "464427506"
  }
}