{
  "manageEntity": {
    "action": "Save",
    "entityId": "506858538",
    "entityType": "Track",
    "nonce": "0x3cf5f9f477031d165dc88c50599248a7b13c510d14cce2bd40abfa47b72ffe7a",
    "signature": "0x172edcc111c495c3c13547f67d65588b387666cf1458e5627b9cb816418f45bb00d72cb19fd80f9787636c453ab246539e0c98ba372c91ac4204e8f02d1398d91b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}