{
  "manageEntity": {
    "action": "Save",
    "entityId": "2112101342",
    "entityType": "Track",
    "nonce": "0xfac8980a74a918488905939893e70681ad31a4225dc0d88ecade9ead14e5a70f",
    "signature": "0x2d5b4da27ec6af08d067bccdc377a3bb156c0fb2242782f0aa6a0acc30c26e9118b6c5db2c3de23b720b5a2b751ee51173ea9e8867419aee85b898b2289527541c",
    "signer": "0x38C35E6d98e3a8e47c96Cc5d8e8DC05C8797Ce75",
    "userId": "266305231"
  }
}