{
  "manageEntity": {
    "action": "Save",
    "entityId": "18861009",
    "entityType": "Track",
    "nonce": "0xbe625198d0e46171d827f96d04a255b018fef123c58693e7e8f0e6ff738431c4",
    "signature": "0x65cb643965f722a0d64fd56a1f7a7e6e4a5846aaa212f126d1f237ac7126776a30451df2bb84074678e151166bf1697c2b66b50cedd61fb31b3f8ca659d7f0691c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}