{
  "manageEntity": {
    "action": "Save",
    "entityId": "1938537610",
    "entityType": "Track",
    "nonce": "0xe551d942e36d6991e65bfd4ed0a3e60cd3c7a285cd63ce1ad163b4388b6e8d67",
    "signature": "0x00cd790d565de0a1a1c27b4f504c7531bc7093332f62eccbce71e012f537db307e37983bd238827913f864baaed50ef4de55c62344662b03d38eb762ea2ef4181c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}