{
  "manageEntity": {
    "action": "Save",
    "entityId": "917874798",
    "entityType": "Track",
    "nonce": "0xe7eb64e1c51574adb6de3f407d93611959f92cf2c2b029dfa7e7fcd0a98ca98a",
    "signature": "0xa7f92eb5535be3299006dde79b1208a270bcb699509ba2c6f5541a9e415429a53cd72f1264797d0857f23529c292ceb92830667f245c9d20152b18cc45b2cd4d1b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}