{
  "manageEntity": {
    "action": "Save",
    "entityId": "1909592904",
    "entityType": "Track",
    "nonce": "0x0ecb26e8b5371c8286567823e4e0b0df4f1975ad65280702591bdfc919ab78be",
    "signature": "0x4699d4a18c16aee502f4636da0b32ca6f4aca2ea280b1ed99a3b0964f6f966c14374dbf3b83b7042cd665bc3c938afa854c6816243ed8e7d09d9390a1813308d1b",
    "signer": "0xdA0eFB0e7b973C487c12501759aDb23012CB5248",
    "userId": "178070"
  }
}