{
  "manageEntity": {
    "action": "Save",
    "entityId": "183897565",
    "entityType": "Track",
    "nonce": "0x01db7e9461c02eea1e23540b25b4b5c0ee3e68c54e729beffe47ba153d93c29a",
    "signature": "0x5b15a46de30757a706f0adef4d88d610cea81d832d09add447e2b89f27f0195855c9ed2951fc3ef9b277a7753ca7bf7787865b6d2fbf6ea7953f2181a33bafb41c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}