{
  "manageEntity": {
    "action": "Save",
    "entityId": "1787304105",
    "entityType": "Track",
    "nonce": "0x81f0de62f31f7562434d0259ac270a909b7bedc4a25f358f749b26a8974aaf3d",
    "signature": "0xe134b85b1dea7fbcd0af7d7262ca17f2748be478cc8989f6c47cff2671a6624b031a14f2b64dc9ebb0a974731fbed8ca2b714f29693afcd7cccb3a97e2c8a2d81b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}