{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "726489",
    "entityType": "User",
    "nonce": "0x0781d5028b2f58dc5a0c70b0045ba37297db45a9577754368629f2d282036571",
    "signature": "0xec3dfab78c34dbba942541c3d3f1af34b15cee34953d4b111484c99e020753b830881c14154263d25864bd0b7e80ab06fc9fcde12108b00449bd8d0d7e1057f51b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}