{
  "manageEntity": {
    "action": "Save",
    "entityId": "1104265",
    "entityType": "Track",
    "nonce": "0x1486b97b15a548d1e214251d3a5571890baa3a4ac25e760603729a849e3d7082",
    "signature": "0xf7afef6a0cfa0129f663c6b9e43b060a6419022936997d052eba45ab1cf680bd3ef553971360074d8c9f9d50b5bbebe2a6a6c59a40cc2e560fc5056b1a9a1c361b",
    "signer": "0x204E506f1D5498d2CABD41d2fc7a3078d5792835",
    "userId": "768479471"
  }
}