{
  "manageEntity": {
    "action": "Save",
    "entityId": "802948",
    "entityType": "Track",
    "nonce": "0x34562dda7aea943ccec511d0ad228a8829c4548c0e386e9396202619a121f7b6",
    "signature": "0xcd56fca869824d53d3c7a256ba7ae4bd6f64852b12fb88547cf0e866e39f2b50259c2a80f0e162c7466541780477ffbba878148539d49fda83fd7a4e680c88c51c",
    "signer": "0xbbB98413eB671bb0000F0b18A2A7Cae9631043E1",
    "userId": "98311147"
  }
}