{
  "manageEntity": {
    "action": "Save",
    "entityId": "466580398",
    "entityType": "Track",
    "nonce": "0x32f6b1274bc4aec958f003b5e85c0be4dcd6f71479f7004d50fdd13b13ff441a",
    "signature": "0x70319f343b44689270eba208e6015d8a8a031441d368b5ceea47f34c12ec746e2659737c9e8542605773a29e48edfdc56e09f50f687360cd9bc0083a36d3cb281b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}