{
  "manageEntity": {
    "action": "Save",
    "entityId": "1662164125",
    "entityType": "Track",
    "nonce": "0x2ae150467d8450be7a45d40414cd12dab565d0ff2db5de2a0588ede285bd6128",
    "signature": "0x7a70d974915caffe473744b823d22d56db867ca52272a69ff756cea241c368133d775dda981de941b7b41d0883b0e9b6b4fbb3ff4fd1d72fb666fc8223f75e941c",
    "signer": "0x63EbE5a1B5C5F156330BDf810f5fFf6A224c75c8",
    "userId": "309080"
  }
}