{
  "manageEntity": {
    "action": "Save",
    "entityId": "1855993972",
    "entityType": "Track",
    "nonce": "0xbad17ac9698abfd7b1545414a918a5d7315b594ad75203564634e574fe90317e",
    "signature": "0x5e9614f0421d5442bfd206f14af63b194c406d60d621f4b77b0720d1162fb5a41806fcab0da3f53e9435b7196598a80b8b30378b30b212d08520c3dc9e6115741c",
    "signer": "0x3D472a01Cb831ac594835ac6038A4346E2A22B94",
    "userId": "327343"
  }
}