{
  "manageEntity": {
    "action": "Save",
    "entityId": "1949336833",
    "entityType": "Track",
    "nonce": "0x5beffc24ee8af36f35eae3f99eb996e21eacde34ddf1faa669eafef5b97eda04",
    "signature": "0x809c9bf40e12e1f4ebb1c851d2b366c31db1c914f78eadaa9ef07357966cf29b2ebc53e2a69c25654c23e31904cad5349e7f0a1ad52d761b131487428c175b0c1b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}