{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1690318",
    "entityType": "User",
    "nonce": "0xbb0615488fd50aff41de809b1fb8d481073f0ebc1337f4a83ba2159c7ead569a",
    "signature": "0xb54fe954e96749102ecbb3b15795d5a7f27b29d5f6cc17fbd382102c01ba128b0682c89d84df87951cfaa8410ba9d1f59b0c23ad9f550342dbf3ef77f6d89fdd1c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}