{
  "manageEntity": {
    "action": "Save",
    "entityId": "837897206",
    "entityType": "Track",
    "nonce": "0x581b2770acc175220248c8fd32922bd0ebf7680deb33278e10237a49be928572",
    "signature": "0x93b193af61c2de531caa7ceca4e67d5e745978af3c315592dab0a6177df6c38662025ddac0a942fe94f9bacf97d2deb7c1ceafd279632ca8d32dd0a1a33b34a01b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}