{
  "manageEntity": {
    "action": "Save",
    "entityId": "788782879",
    "entityType": "Track",
    "nonce": "0xc7d853bd92e4372ceacae8fcd812be0547a9c8203f5031ad10fceab5e2c7ef51",
    "signature": "0x5a6263460f8c8bd06504a636348ecc54fd9810e40a1c66d6a49b335c950b86906462adffc119f0a6e90f7a9e2dfa9cd3923f5dff173e1092822e79aa4432ba141b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}