{
  "manageEntity": {
    "action": "Save",
    "entityId": "1938669936",
    "entityType": "Track",
    "nonce": "0xdcdbb7ece7eecc6e8da83b30dffeb66f138a25307ff56de0528459941b34f0d8",
    "signature": "0x5df0f16376d1d6871ac53d97326f51d051b808afb727b21ae05294bae0d63b9c72cbcf85e8df238d29f6ec9e71e7b23b80d99115e705a3856bad1dae31e862991c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}