{
  "manageEntity": {
    "action": "Save",
    "entityId": "304425",
    "entityType": "Track",
    "nonce": "0x3eac9ce9d98d40c21620908af036dc0baf725180f3413acb7663f4984497c033",
    "signature": "0xf9eee941279ade1e6d6f0e3855e22b121b4c6b83f7c83d129b165a64291fb97703a28829a3141e83b922c4dee104f690414708d39dc23227318d5932061357761b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}