{
  "manageEntity": {
    "action": "Save",
    "entityId": "1472252248",
    "entityType": "Track",
    "nonce": "0x725321a1244526dc5a3927b072a0b19881d15a7d87b6b1a4195dbb4cf307b591",
    "signature": "0x24d9e47a6b7e26b648c9cd2a433d2e7dfcc647857022c32d13cd5d19983afba8125981bbd7663ce9bf9bc777c28eac5a947eff57b33cf907534fa636def87b161c",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}