{
  "manageEntity": {
    "action": "Save",
    "entityId": "995854631",
    "entityType": "Track",
    "nonce": "0x5cc6631618e8fd65cce2ba5e85afc4317c9b6977ea16a829a6d6a311c841cc4b",
    "signature": "0x352b6977f83ae168875ceeb61e5a1c9a647043ff80ae5d7016e3ef46af18252f06bbaac3b33b08270fad407e7fbaf271956807ad891e18e07433eacf4f216f3e1c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}