{
  "manageEntity": {
    "action": "Save",
    "entityId": "1374293561",
    "entityType": "Track",
    "nonce": "0x06c52bbfc46b8c36eabfa304d53d8dd11641947b5db9dd3d5aa03efc1571c3c4",
    "signature": "0x6460a3683911ad4e20cc536ede85b86f8f613f4c181cc0d50c4ad3058490549750ef59835fec90eef949b0166f3c4ef875cfe9e40e031faae63a855fa0a1c6a81b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}