{
  "manageEntity": {
    "action": "Save",
    "entityId": "1278451861",
    "entityType": "Track",
    "nonce": "0x3860902f61084a780e9d90acedb28f2850f111858ccf330d37c4c43099616912",
    "signature": "0xcb6de6a5ce6d946d381907f2f1e3fc306d1450d102a7a77ffde8bb811103b0d1691dc623a4cce564270e2a10386b9a78211eded3606300e9c2452218524fd2931c",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}