{
  "manageEntity": {
    "action": "Save",
    "entityId": "459122",
    "entityType": "Track",
    "nonce": "0x8818b642a69524db0c08e26927f4f1ff62fda58aa68128342a379d80f790b997",
    "signature": "0xd0043ae45958ac01396b222d90097ea86f95a8cdfc654d092eae7b5837c6c7826e5f8fcae6f4d3e4fbbefb5302af3a7324ef52f5ee84d1e354f8a6bef2ea7e2e1b",
    "signer": "0xfa1f98f0530E55C2BEFA45f0F1B3A699b4559136",
    "userId": "149566028"
  }
}