{
  "manageEntity": {
    "action": "Save",
    "entityId": "971236239",
    "entityType": "Track",
    "nonce": "0xc285da030a6264481d34cfd2080358420d0900b9387bd895908a15b7ee73c58f",
    "signature": "0xd3b1df45ee6c6803c2ecd16405b83df68386b8af1f3dd12cfdabdd9f4941549a2c4501d226a2ab666197feb2d40dc8d5bf06c7de565d1df4976298d7fb1379e11b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}