{
  "manageEntity": {
    "action": "Save",
    "entityId": "211441911",
    "entityType": "Track",
    "nonce": "0xfc9448b10c59ba5addb914a0249b3f8059fc0c0ad07853d4669228124c5266c5",
    "signature": "0x7eccf98b6f74d621fa29bc8073cafeb2cfeec82d2f00ec84333bb30738b3a5d27bcb081ab5bc7cd4f456d0cbbb7297fa48e14621440935f575dc21c821d817021c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}