{
  "manageEntity": {
    "action": "Save",
    "entityId": "1154971182",
    "entityType": "Track",
    "nonce": "0x4c7c91e4b2dcb155784e2bdbe93e1026adaeec1d72dc46db4f253d63aa62ccc6",
    "signature": "0x77394bcf62da4d1d196aab64329c7b704a8a8256d13e2955df1aacc1b70427461a446ee5aa724b7b206593cd05c545b4afe20e5b88a285a2cba0d5dbbf427df51c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}