{
  "manageEntity": {
    "action": "Save",
    "entityId": "1989286448",
    "entityType": "Track",
    "nonce": "0x3712cb4d8ff5ad3d5b379616f58f1f94a0d43c995f09e5d163eda4f3b4a090d3",
    "signature": "0xc3a37f13cea608cf550ffb27a93180df2ce4ae44cc0e71fe260f517715e2404c22402182ae868e65deab7ae4c862112fae7a03da76648ce7380db387e29bfccb1b",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}