{
  "manageEntity": {
    "action": "Save",
    "entityId": "349892294",
    "entityType": "Track",
    "nonce": "0x730d7476e5f75aba2d58c999e23323cb6fad0267ed16f5b343ab3e6df8c5727a",
    "signature": "0x442057c3aefbd82c1b8da6318c51b83daef1456852c01f2784a9febac902f25c70ab83091a36adccf09f81f2cf48f8e4fe14f8bbd1daae12ace56f862811a2bf1b",
    "signer": "0xBe0B2B2beC4B0A46ff11169512DF7f66E775c0B3",
    "userId": "196632465"
  }
}