{
  "manageEntity": {
    "action": "Save",
    "entityId": "1001550320",
    "entityType": "Track",
    "nonce": "0x5ea06510a2f4d4c6af639c90342f39c5090c5ee5277ec99ca6531a901362aa77",
    "signature": "0x669d504bf26f5909acc53d4715cf92ebdd7c491f385b105135a32b2817dec92333acb7707a05795ceebfc8b6dac58420fb4dc51ff0a3ae730125d83537b581e71c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}