{
  "manageEntity": {
    "action": "Save",
    "entityId": "676921124",
    "entityType": "Track",
    "nonce": "0x3508713407de73fc7062fc998167281755de640910dabb40e157dfb5638f7faf",
    "signature": "0xec2c7ecf61f0ebeef2f2eaf225efc69a875af2fff90f2e74a00f0d80950554d67d78eb3134d1f68671e4c1af426755c6f8d1d3762d3a33c5f8e6790728d007761c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}