{
  "manageEntity": {
    "action": "Save",
    "entityId": "1592526297",
    "entityType": "Track",
    "nonce": "0x666ea8cea4644044cf5beb3df78f489d77cae92ba9ba84455dd00d1cd97c1500",
    "signature": "0xe277291a21cb97d95ec12711d5286198b3eb9f3269484eb0c1f2df0e4fdcd25972a4bd7cbc6dbcd3d76a91b89fd68dcf1532e3f3227a352e20496d2571289a781c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}