{
  "manageEntity": {
    "action": "Save",
    "entityId": "231098019",
    "entityType": "Track",
    "nonce": "0xdc2938e831b270f644478145d7f12e90fc51e6c1d7f404ac2f5cbdec287dc6d9",
    "signature": "0x544c04b9af3d3c0666f5f9e95180ca3216714b95d3104d6e83ea2cdd2061abd16280cd5898e153e54152048f6c8f147529d534630124aa39d7406d38ad9875a91b",
    "signer": "0x2F7db4C1AE3922aD0f32CEdED1870278dd17b64b",
    "userId": "467213409"
  }
}