{
  "manageEntity": {
    "action": "Save",
    "entityId": "706192183",
    "entityType": "Track",
    "nonce": "0x9cdde08e494af82604fd01d09a8d25764199789bca0cd1e8f15f9a1742122349",
    "signature": "0x1602878167af796905fc9eacba05406b16c42aad3cdc250640cea58991ec00df3e9268889b5613bd7959827d8078ea1c8ccb149cc79228588cae02be844f90151b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}