{
  "manageEntity": {
    "action": "Save",
    "entityId": "414319761",
    "entityType": "Track",
    "nonce": "0xdd358ba481f58e7de7ae1d6ec3742707d3ffe4468714bc125d353ff79ce73faa",
    "signature": "0x73ff1d881d22adfb0acd928c7b276e1becdcb0f0f839fcd738b59a515d9885e26c35a852bd1659d232a721a90b5ba29f3bc3d02de330bc4a1d9dac2e91ff2d8e1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}