{
  "manageEntity": {
    "action": "Save",
    "entityId": "47520192",
    "entityType": "Track",
    "nonce": "0x4032f36443ab999f59470fd0bde98650cd4d1cedd72caf3761d2f7bf979e7259",
    "signature": "0xaae4b52551c91d8eee1bec74408fab5f977d3b259d95c3d394aa77566b7c255528a62fe81f288a850c24fb847f6b8a0367629e63dc710a4829dc9bc8696633321b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}