{
  "manageEntity": {
    "action": "Save",
    "entityId": "1455343252",
    "entityType": "Track",
    "nonce": "0x5db84474840c55e04789a8d70b256b0aae5d3d32eca3f5aed2654f6a355dd20d",
    "signature": "0xe1b26def63c2b683b09278cca61d3f7b09274474610d4ee0af4e894890ba5698456b916765f71b8f42229ca36024223fcec85b05c5cda63ac42b008d1c077f831b",
    "signer": "0x59765b22C96E88dA578af23E8611d6ca2dcCd7C9",
    "userId": "377610060"
  }
}