{
  "manageEntity": {
    "action": "Save",
    "entityId": "911802334",
    "entityType": "Track",
    "nonce": "0x845e2cfbde9ca9d57fb0f1f33bb084bea64c4b78a2dd8dc87543ae06dac692f6",
    "signature": "0xe02fcad7a489092ab02530f602cb3ff799c5f3a3d3ae231757fea1086dae8e290935caca9ccd1cc4737adf29e45093cf2633bb071f9e284450bfbc74ed837b5d1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}