{
  "manageEntity": {
    "action": "Save",
    "entityId": "380280",
    "entityType": "Track",
    "nonce": "0x1ab5c61c16a96276214749e67deb1e288f96567da4fe0c9ecd5441f7e58b0f1e",
    "signature": "0x60bf8a604bf893bed9f2a76d635753ecfc005fe4cb2a41225d72822e8e02bc446bb3f73734e077cd6a18bbe898bad834682b836f4d177112d8098cb4a7462be91b",
    "signer": "0xF80c0D1Fe03CeAfdcF09BD1684cAb6e70028A0Ee",
    "userId": "818183762"
  }
}