{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "900057687",
    "entityType": "User",
    "nonce": "0x8ea16cc3d658539e5298eba170bc992f0a72888f10a39aa79414d8e2e274409a",
    "signature": "0x32ae439330593a5f87a6349b8ebff3c5bd07ece3591edc5289f414705d9da3d1477d58a434e2767d6e5fca766e49d8739855dc9c73991d33fa953f5c3fa5066a1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}