{
  "manageEntity": {
    "action": "Save",
    "entityId": "1089156257",
    "entityType": "Track",
    "nonce": "0x5c75328bc1bf6ef2b5e386094fd19f9489afa3d6257ce931968348a0af41b356",
    "signature": "0x386b6b206c692850ffcdb564cbf75cc5d1505c963f10ceb62c5f2dbc25866e9d178352e9eabcff63d4819a536b53836358a2e08d595300d67b18cc8f3a1010411c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}