{
  "manageEntity": {
    "action": "Save",
    "entityId": "809644952",
    "entityType": "Track",
    "nonce": "0x2be51aefa8ccf711e70e2d4c21c84efb8d5032c303035fbed7b01158cf016238",
    "signature": "0x8469d329b4423d645d4758106cb3947d090c9cd5578f06f6a90fc1e5b017c9f766416b95c5692c0b5cff9ac1ca99bb8c0b88772fa512622d9bd0cb21118a32751b",
    "signer": "0xDD30291C1907407dCb56A9E83223fD2703C19129",
    "userId": "380172"
  }
}