{
  "manageEntity": {
    "action": "Save",
    "entityId": "571704",
    "entityType": "Track",
    "nonce": "0x5369a00dd67353b044d46fc5eb04cfeea960bfdb48af6cc31f3c0312e3c433d2",
    "signature": "0x1671958cf50ead5d28b3b61a636cf260a023702eb328952818bfcdd46ae6a97e4c1a0f6809ab629f88fa9658919e82e4f9d4218d5dedc751d7ac2d2a9c94f7011b",
    "signer": "0xa8E11aa224d2579f5cbdb912866bCE84Eb10f9dD",
    "userId": "951616224"
  }
}