{
  "manageEntity": {
    "action": "Save",
    "entityId": "1124578",
    "entityType": "Track",
    "nonce": "0x9bfd99dcd9ef0d11e0942f29c1840e6541a9f009493fee69884444ed032b5bf1",
    "signature": "0xbf4917e5e12b0b2dd7fdfee33967812a3bded5ebb1f8bb372d9a413a08c58a1b6dadd1fca97573469d3aeb9248fa3799f6f76f647b2a2d6d3d9486c555d0e4051b",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}